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release time:2024-01-05 Hits: Popular:AG11 battery
The research on megawatt-level flywheel energy storage technology in my country's Energy Technology Revolution Innovation Action Plan has achieved a breakthrough. The GTR flywheel energy storage device was officially commercialized at Guangyang City Station on the Fangshan Line of the Beijing Subway on July 8, filling the gap in the domestic application of flywheel energy storage devices. Solve the gap in regenerative braking energy recovery methods for urban rail transit.
Flywheel energy storage is different from chemical energy storage such as lead-acid batteries and lithium batteries that we are familiar with in the past. It uses an electric motor to drive a flywheel to rotate at high speed to store energy. When the speed increases, it is charged, and when the speed decreases, it can be discharged. Not only can it respond to high-power charge and discharge within 5 milliseconds, but its charge and discharge life span is as high as tens of millions of times.
In the power distribution room of Guangyangcheng Station on the Fangshan Line of the Beijing Metro, these inconspicuous electrical cabinets are megawatt-level flywheel energy storage devices. When a subway train enters the station and brakes, a huge amount of electrical energy is generated, which was wasted in the past. Now it can be used to accelerate the rotation of the flywheel, which is equivalent to storing electrical energy. When the train leaves the station and starts, the electrical energy can be released. Not only does it turn waste into treasure, but it also reduces electricity consumption. Using it, this station can save nearly 1,500 kilowatt hours of electricity every day on average.
The speed of the flywheel is as high as 36,000 revolutions per minute. The speed of the flywheel edge is equivalent to the flight speed of a bullet, twice the speed of sound. How to make such a flywheel equipment operate stably and safely? Scientific researchers have to overcome materials science, dynamics, motor control, etc. Series of technical problems.
According to reports, flywheel energy storage technology can be widely used in subways, high-speed rail, special aerospace, medical, power grid and other fields.
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